Purpose: Used to indicate the method for applying wheel distribution factors in Girder System Projects where the wheel distribution factor approach is used instead of lane loading. (Not applicable to Line Girder Projects.)
--> Given in girder system input
Loading effects determined by wheel distribution loading for a particular girder uses only the distribution given for that girder. (See WDD-i , WDF-i , WDR-i , WDS-i )
In contrast, since the influence surface for a particular effect drapes over the entire system, loading effects for a particular girder uses distribution factors for all girders applied to the slice of influence surface coinciding with each of those girders. Distribution factors that are given without using this condition can be viewed as modeling multilane loading, and the factors should be determined accordingly.